It’s the Chanukah section of the Talmud. That’s all that really need be said (though we also talk about why the things that aren’t kosher for shabbat candles aren’t).
Click here for the Talking Talmud podcast on Shabbat Daf 21.
To listen: Click the link above. Or subscribe wherever you get your podcasts. Or join the Talking Talmud WhatsApp group, and receive the link as soon as it goes up.
Also, you can now find Talking Talmud on Facebook – you are most welcome to “like” the page and join the conversation there.